Spring device.



PATENTED MAY 21 1907.

M i a w 1 W w m m fwfi w @Mu Q w 4% w a Q a 7 Q Q a j w -T Q F H@ w F? W y UNITED STATES PA ENT OFFICE.

CARL-HAINLIN, on NEW YORK, .N. Y., ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, OF ONE-FOURTH TO EUGENE, E.-VON SEYFRIED, OF

NEWARK, NEW JERSEY, AND ONE-FOURTH T JULIUS DAVIS, or NEW YORK, N. Y.

Patented May 21, 1907.

Application filed February 18, 1907. Serial No. 358,045-

To. all whom it may concern:

- Be itknown that I, CARL HAINLIN, a former sub'ect of the Emperor of Germany, havihg eclared my intention to become a citizen of the United States, a resident of New York, borough of- Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Spring Devices, of which the following is a specification. v

Myinvention relates to spring devices, such as may be used in connection with rolling stock 'to distribute the strain of resistance offered by the load when it is started orobstructed, for example; as a connection between the-whiflle' -tree and trace to gradliate the strain due to the load, whereby damageto the harness and horse is considerably lessened. I I The object of m invention is a device of character whic is. simplein construction,

' compact and strong, and such that it'yields after which'a greater 2 under a slight pull to a predetermined extent, all is required, the total possible range of being predetermined. y c

For this purpose my invention consists essentially of two bolts, the one about the other; two concentric springs about the respective bolts. and means to limit the actlons of said spl'ings.

The nature of my invention will be best understood in connection with the accompanying drawings in which Figure 1 is an; elevation, partly in section, of my improved spring device. Figs. 2, 3, and 4 are views of the slotted tube and spring. Fig. 5 is an elevation of the headed bolt. Fig. 6 is an elevation of the forked bolt. Fig. 7 is an elevation, partly in section, showing the spring device under maximum extension. I

Similar characters of reference indicate corresponding parts throughout the several views.

Referring to the drawings, wand 11 are bolts adapted to be connected to take up op osite stresses.

he bolt 10 is shown as round and provided with the head 12 and eye 13 for outside connection, as for example to a whifiietree. The bolt 11 is shown with forkcdends the spring actions r I claim having stops or shoulders 14, and is provided with a hook 15-f0r outsideconnectlon, as for example to a trace.

About the headed bolt 10 and within the arms of the forked bolt 11 is a slotted tube 16, the stops 14 being sprung into said slots and arranged to engage therewith. The upper end of this tube is provided with the head 17. Between the lower end of said tube and the head 12 of bolt 10 is held a flat spiral spring 18 coiled about the said bolt 10. Around the forked bolt llris wound a round helical spring 19 which incases all the parts, the eye 13 of bolt 10 and the hook 15 of bolt 11 projecting, as shown. Under normal conditions the relative. position of the various parts are as shown in Fig. 1. The spring 18 is relatively weak, while the s ring 19 is 'made strong. the relative strengt s of these springs being proportioned to the use to which they are intended. a As a pull is put upon the spring device, spring 18 is compressed a 'ainst the lower edge of tube 16 through t e drawing up of head 12 of bolt 10. This s ring will remain action'until it is entire y closed as shown in Fig. 7. The extent of this compression is predetermined and arranged to suit the use to which the spring is put. After spring 18 has closed the tube 16 and said spring act-virtually as one piece, and upon further pull upon the bolts, spring 19 extends, the head 17 acting against spring 19. This extension will continue with increased pull until the sto s 14 act against the bottom of the slots 0 said tube 16, as shown in Fig. 7. This is the limit of the spring action and further pull upon the bolts is carried by the said bolts only, the two bolts acting virtually as one,-

fie-tree and trace, it is evident that it may be applied to many other useful urposes. It may serve even asa spring ba ance, in which a relatively large movement is obtained for slight pulls, on a spring balance designed to also measure heavy pulls.

In a s ring device: a headed boltya slotted tu e about said bolt and rovided with a head; a spring about said bo t and in.-

New York, and State of New York, this 16th day ofFebroary, 1907.

' CARL HAINLIN.

terposed between said slotted tube and the head of said bolt; a forked 'bolt about said headed bolt, having stops engaging theslots of said tube; and a helical spring about said 5 bolts and spring, concentric therewith and inc1osing said bolts and spring.

.Signed at New York, in the county of Witnesses: E. E. VON SEYFRIED, FREDK. F. SOHUETZ. 

